Physics (Measuring temperature)

Question 1

Temperature is a measure of what?

Answer 1

It is a measure of the degree of hotness of an object.

Question 2

What properties do thermometers make use of?

Answer 2

Temperature-dependent properties

Question 3

A ________ is an instrument to measure temperature.

Answer 3

thermometer

Question 4

A temperature scale is defined by choosing two temperatures as __________________ and dividing the range in-between into equal divisions called _______________.

Answer 4

Fixed points
degrees

Question 5

Name the features of ice point.

Answer 5

Lower fixed point
0 degree celsius
Temperature of pure melting ice

Question 6

Name the features of steam point.

Answer 6

Upper fixed point
100 degree celsius
Temperature of steam over pure boiling water

Question 7

What is the temperature-dependent property of liquid-in-glass thermometer?

Answer 7

Expansion of liquid

Question 8

What is the temperature-dependent property of rotary thermometer?

Answer 8

Curvature of bimetallic strip
Copper expands more
Iron expands less

Question 9

What is the temperature-dependent property of infra-red thermometer?

Answer 9

Intensity of infra-red radiation
Higher temperature means more infra-red radiation

Question 10

What is the temperature-dependent property of resistance thermometer?

Answer 10

Resistance of metal
Higher temperature means more resistance

Question 11

What is the temperature-dependent property of thermistor thermometer?

Answer 11

Resistance of thermistor
Higher temperature means less resistance of thermistor

Question 12

We need two _______ to define the Celcius temperature scale.

Answer 12

Fixed points

Question 13

State the definitions of the lower and upper fixed points in the Celsius temperature scale.

Answer 13

Lower fixed point is the temperature of pure melting ice at normal atmospheric pressure.

Upper fixed point is the temperature of the steam over pure boiling water at normal atmospheric pressure.

Question 14

What is the temperature of ice point and steam point?

Answer 14

Ice point: 0 degree celcius
Steam point: 100 degree celsius

Question 15

How can we calibrate a thermometer?

Answer 15

Put an unmarked liquid-in-glass thermometer in a beaker of pure melting ice. Mark the liquid level.
Repeat step 1 with pure boiling water.
Divide the lenght between the two markings into 100 equal divisions

Question 16

What is the formula of calculating the calibration of thermometer?

Answer 16

L(t)-L(0)/L(100)-L(0) = t-0/100-0